This is the David Smart RA8875 Library with mods for working with FRDM-K64F
GraphicsDisplayGIF.cpp@152:a013ac0133e4, 2017-11-06 (annotated)
- Committer:
- WiredHome
- Date:
- Mon Nov 06 01:41:55 2017 +0000
- Revision:
- 152:a013ac0133e4
- Child:
- 177:d8e65c0e268a
Initial support for GIF rendering
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
WiredHome | 152:a013ac0133e4 | 1 | |
WiredHome | 152:a013ac0133e4 | 2 | |
WiredHome | 152:a013ac0133e4 | 3 | |
WiredHome | 152:a013ac0133e4 | 4 | // GIFRender.cpp : Defines the entry point for the console application. |
WiredHome | 152:a013ac0133e4 | 5 | // |
WiredHome | 152:a013ac0133e4 | 6 | // The code in this file was initially found online, in a tutorial. |
WiredHome | 152:a013ac0133e4 | 7 | // It has been revised significantly in this derivative. |
WiredHome | 152:a013ac0133e4 | 8 | // No copyright claim was found in the code. |
WiredHome | 152:a013ac0133e4 | 9 | // http://commandlinefanatic.com/cgi-bin/showarticle.cgi?article=art011 |
WiredHome | 152:a013ac0133e4 | 10 | // |
WiredHome | 152:a013ac0133e4 | 11 | |
WiredHome | 152:a013ac0133e4 | 12 | #include "mbed.h" |
WiredHome | 152:a013ac0133e4 | 13 | |
WiredHome | 152:a013ac0133e4 | 14 | #include "GraphicsDisplay.h" |
WiredHome | 152:a013ac0133e4 | 15 | |
WiredHome | 152:a013ac0133e4 | 16 | |
WiredHome | 152:a013ac0133e4 | 17 | #define DEBUG "GIF_" |
WiredHome | 152:a013ac0133e4 | 18 | // |
WiredHome | 152:a013ac0133e4 | 19 | // INFO("Stuff to show %d", var); // new-line is automatically appended |
WiredHome | 152:a013ac0133e4 | 20 | // |
WiredHome | 152:a013ac0133e4 | 21 | #if (defined(DEBUG) && !defined(TARGET_LPC11U24)) |
WiredHome | 152:a013ac0133e4 | 22 | #define INFO(x, ...) std::printf("[INF %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__); |
WiredHome | 152:a013ac0133e4 | 23 | #define WARN(x, ...) std::printf("[WRN %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__); |
WiredHome | 152:a013ac0133e4 | 24 | #define ERR(x, ...) std::printf("[ERR %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__); |
WiredHome | 152:a013ac0133e4 | 25 | static void HexDump(const char * title, const uint8_t * p, int count) { |
WiredHome | 152:a013ac0133e4 | 26 | int i; |
WiredHome | 152:a013ac0133e4 | 27 | char buf[100] = "0000: "; |
WiredHome | 152:a013ac0133e4 | 28 | |
WiredHome | 152:a013ac0133e4 | 29 | if (*title) |
WiredHome | 152:a013ac0133e4 | 30 | INFO("%s", title); |
WiredHome | 152:a013ac0133e4 | 31 | for (i = 0; i<count; ) { |
WiredHome | 152:a013ac0133e4 | 32 | sprintf(buf + strlen(buf), "%02X ", *(p + i)); |
WiredHome | 152:a013ac0133e4 | 33 | if ((++i & 0x0F) == 0x00) { |
WiredHome | 152:a013ac0133e4 | 34 | INFO("%s", buf); |
WiredHome | 152:a013ac0133e4 | 35 | if (i < count) |
WiredHome | 152:a013ac0133e4 | 36 | sprintf(buf, "%04X: ", i); |
WiredHome | 152:a013ac0133e4 | 37 | else |
WiredHome | 152:a013ac0133e4 | 38 | buf[0] = '\0'; |
WiredHome | 152:a013ac0133e4 | 39 | } |
WiredHome | 152:a013ac0133e4 | 40 | } |
WiredHome | 152:a013ac0133e4 | 41 | if (strlen(buf)) |
WiredHome | 152:a013ac0133e4 | 42 | INFO("%s", buf); |
WiredHome | 152:a013ac0133e4 | 43 | } |
WiredHome | 152:a013ac0133e4 | 44 | #else |
WiredHome | 152:a013ac0133e4 | 45 | #define INFO(x, ...) |
WiredHome | 152:a013ac0133e4 | 46 | #define WARN(x, ...) |
WiredHome | 152:a013ac0133e4 | 47 | #define ERR(x, ...) |
WiredHome | 152:a013ac0133e4 | 48 | #define HexDump(a, b, c) |
WiredHome | 152:a013ac0133e4 | 49 | #endif |
WiredHome | 152:a013ac0133e4 | 50 | |
WiredHome | 152:a013ac0133e4 | 51 | |
WiredHome | 152:a013ac0133e4 | 52 | #define EXTENSION_INTRODUCER 0x21 |
WiredHome | 152:a013ac0133e4 | 53 | #define IMAGE_DESCRIPTOR 0x2C |
WiredHome | 152:a013ac0133e4 | 54 | #define TRAILER 0x3B |
WiredHome | 152:a013ac0133e4 | 55 | |
WiredHome | 152:a013ac0133e4 | 56 | #define GRAPHIC_CONTROL 0xF9 |
WiredHome | 152:a013ac0133e4 | 57 | #define APPLICATION_EXTENSION 0xFF |
WiredHome | 152:a013ac0133e4 | 58 | #define COMMENT_EXTENSION 0xFE |
WiredHome | 152:a013ac0133e4 | 59 | #define PLAINTEXT_EXTENSION 0x01 |
WiredHome | 152:a013ac0133e4 | 60 | |
WiredHome | 152:a013ac0133e4 | 61 | |
WiredHome | 152:a013ac0133e4 | 62 | typedef struct { |
WiredHome | 152:a013ac0133e4 | 63 | unsigned char byte; |
WiredHome | 152:a013ac0133e4 | 64 | int prev; |
WiredHome | 152:a013ac0133e4 | 65 | int len; |
WiredHome | 152:a013ac0133e4 | 66 | } dictionary_entry_t; |
WiredHome | 152:a013ac0133e4 | 67 | |
WiredHome | 152:a013ac0133e4 | 68 | typedef struct { |
WiredHome | 152:a013ac0133e4 | 69 | unsigned char extension_code; |
WiredHome | 152:a013ac0133e4 | 70 | unsigned char block_size; |
WiredHome | 152:a013ac0133e4 | 71 | } extension_t; |
WiredHome | 152:a013ac0133e4 | 72 | const uint16_t extension_size = 2; |
WiredHome | 152:a013ac0133e4 | 73 | |
WiredHome | 152:a013ac0133e4 | 74 | typedef struct { |
WiredHome | 152:a013ac0133e4 | 75 | unsigned char fields; |
WiredHome | 152:a013ac0133e4 | 76 | unsigned short delay_time; |
WiredHome | 152:a013ac0133e4 | 77 | unsigned char transparent_color_index; |
WiredHome | 152:a013ac0133e4 | 78 | } graphic_control_extension_t; |
WiredHome | 152:a013ac0133e4 | 79 | const uint16_t graphic_control_extension_size = 4; |
WiredHome | 152:a013ac0133e4 | 80 | |
WiredHome | 152:a013ac0133e4 | 81 | typedef struct { |
WiredHome | 152:a013ac0133e4 | 82 | unsigned char application_id[8]; |
WiredHome | 152:a013ac0133e4 | 83 | unsigned char version[3]; |
WiredHome | 152:a013ac0133e4 | 84 | } application_extension_t; |
WiredHome | 152:a013ac0133e4 | 85 | const uint16_t application_extension_size = 11; |
WiredHome | 152:a013ac0133e4 | 86 | |
WiredHome | 152:a013ac0133e4 | 87 | typedef struct { |
WiredHome | 152:a013ac0133e4 | 88 | unsigned short left; |
WiredHome | 152:a013ac0133e4 | 89 | unsigned short top; |
WiredHome | 152:a013ac0133e4 | 90 | unsigned short width; |
WiredHome | 152:a013ac0133e4 | 91 | unsigned short height; |
WiredHome | 152:a013ac0133e4 | 92 | unsigned char cell_width; |
WiredHome | 152:a013ac0133e4 | 93 | unsigned char cell_height; |
WiredHome | 152:a013ac0133e4 | 94 | unsigned char foreground_color; |
WiredHome | 152:a013ac0133e4 | 95 | unsigned char background_color; |
WiredHome | 152:a013ac0133e4 | 96 | } plaintext_extension_t; |
WiredHome | 152:a013ac0133e4 | 97 | const uint16_t plaintext_extension_size = 12; |
WiredHome | 152:a013ac0133e4 | 98 | |
WiredHome | 152:a013ac0133e4 | 99 | |
WiredHome | 152:a013ac0133e4 | 100 | size_t GraphicsDisplay::read_filesystem_bytes(void * buffer, int numBytes, FILE * fh) { |
WiredHome | 152:a013ac0133e4 | 101 | size_t bytesRead; |
WiredHome | 152:a013ac0133e4 | 102 | |
WiredHome | 152:a013ac0133e4 | 103 | bytesRead = fread(buffer, 1, numBytes, fh); |
WiredHome | 152:a013ac0133e4 | 104 | HexDump("mem", (const uint8_t *) buffer, bytesRead); |
WiredHome | 152:a013ac0133e4 | 105 | return bytesRead; |
WiredHome | 152:a013ac0133e4 | 106 | } |
WiredHome | 152:a013ac0133e4 | 107 | |
WiredHome | 152:a013ac0133e4 | 108 | |
WiredHome | 152:a013ac0133e4 | 109 | /// uncompress_gif the data to memory |
WiredHome | 152:a013ac0133e4 | 110 | /// |
WiredHome | 152:a013ac0133e4 | 111 | /// @param[in] code_length is the size of this descriptor field |
WiredHome | 152:a013ac0133e4 | 112 | /// @param[in] input is a pointer to the input data |
WiredHome | 152:a013ac0133e4 | 113 | /// @param[in] input_length is the number of bytes in the input. |
WiredHome | 152:a013ac0133e4 | 114 | /// @param[out] out is where the uncompress_gifed information is written. |
WiredHome | 152:a013ac0133e4 | 115 | /// @return noerror on success, or failure code |
WiredHome | 152:a013ac0133e4 | 116 | /// |
WiredHome | 152:a013ac0133e4 | 117 | RetCode_t GraphicsDisplay::uncompress_gif(int code_length, const unsigned char *input, int input_length, unsigned char *out) { |
WiredHome | 152:a013ac0133e4 | 118 | int i, bit; |
WiredHome | 152:a013ac0133e4 | 119 | int code, prev = -1; |
WiredHome | 152:a013ac0133e4 | 120 | dictionary_entry_t * dictionary; |
WiredHome | 152:a013ac0133e4 | 121 | int dictionary_ind; |
WiredHome | 152:a013ac0133e4 | 122 | unsigned int mask = 0x01; |
WiredHome | 152:a013ac0133e4 | 123 | int reset_code_length; |
WiredHome | 152:a013ac0133e4 | 124 | int clear_code; // This varies depending on code_length |
WiredHome | 152:a013ac0133e4 | 125 | int stop_code; // one more than clear code |
WiredHome | 152:a013ac0133e4 | 126 | int match_len; |
WiredHome | 152:a013ac0133e4 | 127 | |
WiredHome | 152:a013ac0133e4 | 128 | clear_code = 1 << (code_length); |
WiredHome | 152:a013ac0133e4 | 129 | stop_code = clear_code + 1; |
WiredHome | 152:a013ac0133e4 | 130 | reset_code_length = code_length; |
WiredHome | 152:a013ac0133e4 | 131 | |
WiredHome | 152:a013ac0133e4 | 132 | // Create a dictionary large enough to hold "code_length" entries. |
WiredHome | 152:a013ac0133e4 | 133 | // Once the dictionary overflows, code_length increases |
WiredHome | 152:a013ac0133e4 | 134 | dictionary = (dictionary_entry_t *) malloc(sizeof(dictionary_entry_t) * (1 << (code_length + 1))); |
WiredHome | 152:a013ac0133e4 | 135 | if (dictionary == NULL) |
WiredHome | 152:a013ac0133e4 | 136 | return not_enough_ram; |
WiredHome | 152:a013ac0133e4 | 137 | // Initialize the first 2^code_len entries of the dictionary with their |
WiredHome | 152:a013ac0133e4 | 138 | // indices. The rest of the entries will be built up dynamically. |
WiredHome | 152:a013ac0133e4 | 139 | |
WiredHome | 152:a013ac0133e4 | 140 | // Technically, it shouldn't be necessary to initialize the |
WiredHome | 152:a013ac0133e4 | 141 | // dictionary. The spec says that the encoder "should output a |
WiredHome | 152:a013ac0133e4 | 142 | // clear code as the first code in the image data stream". It doesn't |
WiredHome | 152:a013ac0133e4 | 143 | // say must, though... |
WiredHome | 152:a013ac0133e4 | 144 | for (dictionary_ind = 0; dictionary_ind < (1 << code_length); dictionary_ind++) { |
WiredHome | 152:a013ac0133e4 | 145 | dictionary[dictionary_ind].byte = (uint8_t) dictionary_ind; |
WiredHome | 152:a013ac0133e4 | 146 | // XXX this only works because prev is a 32-bit int (> 12 bits) |
WiredHome | 152:a013ac0133e4 | 147 | dictionary[dictionary_ind].prev = -1; |
WiredHome | 152:a013ac0133e4 | 148 | dictionary[dictionary_ind].len = 1; |
WiredHome | 152:a013ac0133e4 | 149 | } |
WiredHome | 152:a013ac0133e4 | 150 | // 2^code_len + 1 is the special "end" code; don't give it an entry here |
WiredHome | 152:a013ac0133e4 | 151 | dictionary_ind++; |
WiredHome | 152:a013ac0133e4 | 152 | dictionary_ind++; |
WiredHome | 152:a013ac0133e4 | 153 | |
WiredHome | 152:a013ac0133e4 | 154 | // TODO verify that the very last byte is clear_code + 1 |
WiredHome | 152:a013ac0133e4 | 155 | while (input_length) { |
WiredHome | 152:a013ac0133e4 | 156 | code = 0x0; |
WiredHome | 152:a013ac0133e4 | 157 | // Always read one more bit than the code length |
WiredHome | 152:a013ac0133e4 | 158 | for (i = 0; i < (code_length + 1); i++) { |
WiredHome | 152:a013ac0133e4 | 159 | // This is different than in the file read example; that |
WiredHome | 152:a013ac0133e4 | 160 | // was a call to "next_bit" |
WiredHome | 152:a013ac0133e4 | 161 | bit = (*input & mask) ? 1 : 0; |
WiredHome | 152:a013ac0133e4 | 162 | mask <<= 1; |
WiredHome | 152:a013ac0133e4 | 163 | if (mask == 0x100) { |
WiredHome | 152:a013ac0133e4 | 164 | mask = 0x01; |
WiredHome | 152:a013ac0133e4 | 165 | input++; |
WiredHome | 152:a013ac0133e4 | 166 | input_length--; |
WiredHome | 152:a013ac0133e4 | 167 | } |
WiredHome | 152:a013ac0133e4 | 168 | code = code | (bit << i); |
WiredHome | 152:a013ac0133e4 | 169 | } |
WiredHome | 152:a013ac0133e4 | 170 | if (code == clear_code) { |
WiredHome | 152:a013ac0133e4 | 171 | code_length = reset_code_length; |
WiredHome | 152:a013ac0133e4 | 172 | dictionary = (dictionary_entry_t *) realloc(dictionary, |
WiredHome | 152:a013ac0133e4 | 173 | sizeof(dictionary_entry_t) * (1 << (code_length + 1))); |
WiredHome | 152:a013ac0133e4 | 174 | for (dictionary_ind = 0; dictionary_ind < (1 << code_length); dictionary_ind++) { |
WiredHome | 152:a013ac0133e4 | 175 | dictionary[dictionary_ind].byte = (uint8_t) dictionary_ind; |
WiredHome | 152:a013ac0133e4 | 176 | // XXX this only works because prev is a 32-bit int (> 12 bits) |
WiredHome | 152:a013ac0133e4 | 177 | dictionary[dictionary_ind].prev = -1; |
WiredHome | 152:a013ac0133e4 | 178 | dictionary[dictionary_ind].len = 1; |
WiredHome | 152:a013ac0133e4 | 179 | } |
WiredHome | 152:a013ac0133e4 | 180 | dictionary_ind++; |
WiredHome | 152:a013ac0133e4 | 181 | dictionary_ind++; |
WiredHome | 152:a013ac0133e4 | 182 | prev = -1; |
WiredHome | 152:a013ac0133e4 | 183 | continue; |
WiredHome | 152:a013ac0133e4 | 184 | } else if (code == stop_code) { |
WiredHome | 152:a013ac0133e4 | 185 | if (input_length > 1) { |
WiredHome | 152:a013ac0133e4 | 186 | free(dictionary); |
WiredHome | 152:a013ac0133e4 | 187 | return not_supported_format; |
WiredHome | 152:a013ac0133e4 | 188 | } |
WiredHome | 152:a013ac0133e4 | 189 | break; |
WiredHome | 152:a013ac0133e4 | 190 | } |
WiredHome | 152:a013ac0133e4 | 191 | |
WiredHome | 152:a013ac0133e4 | 192 | // Update the dictionary with this character plus the _entry_ |
WiredHome | 152:a013ac0133e4 | 193 | // (character or string) that came before it |
WiredHome | 152:a013ac0133e4 | 194 | if ((prev > -1) && (code_length < 12)) { |
WiredHome | 152:a013ac0133e4 | 195 | if (code > dictionary_ind) { |
WiredHome | 152:a013ac0133e4 | 196 | //fprintf(stderr, "code = %.02x, but dictionary_ind = %.02x\n", code, dictionary_ind); |
WiredHome | 152:a013ac0133e4 | 197 | free(dictionary); |
WiredHome | 152:a013ac0133e4 | 198 | return not_supported_format; |
WiredHome | 152:a013ac0133e4 | 199 | } |
WiredHome | 152:a013ac0133e4 | 200 | if (code == dictionary_ind) { |
WiredHome | 152:a013ac0133e4 | 201 | int ptr = prev; |
WiredHome | 152:a013ac0133e4 | 202 | |
WiredHome | 152:a013ac0133e4 | 203 | while (dictionary[ptr].prev != -1) { |
WiredHome | 152:a013ac0133e4 | 204 | ptr = dictionary[ptr].prev; |
WiredHome | 152:a013ac0133e4 | 205 | } |
WiredHome | 152:a013ac0133e4 | 206 | dictionary[dictionary_ind].byte = dictionary[ptr].byte; |
WiredHome | 152:a013ac0133e4 | 207 | } else { |
WiredHome | 152:a013ac0133e4 | 208 | int ptr = code; |
WiredHome | 152:a013ac0133e4 | 209 | while (dictionary[ptr].prev != -1) { |
WiredHome | 152:a013ac0133e4 | 210 | ptr = dictionary[ptr].prev; |
WiredHome | 152:a013ac0133e4 | 211 | } |
WiredHome | 152:a013ac0133e4 | 212 | dictionary[dictionary_ind].byte = dictionary[ptr].byte; |
WiredHome | 152:a013ac0133e4 | 213 | } |
WiredHome | 152:a013ac0133e4 | 214 | dictionary[dictionary_ind].prev = prev; |
WiredHome | 152:a013ac0133e4 | 215 | dictionary[dictionary_ind].len = dictionary[prev].len + 1; |
WiredHome | 152:a013ac0133e4 | 216 | dictionary_ind++; |
WiredHome | 152:a013ac0133e4 | 217 | // GIF89a mandates that this stops at 12 bits |
WiredHome | 152:a013ac0133e4 | 218 | if ((dictionary_ind == (1 << (code_length + 1))) && |
WiredHome | 152:a013ac0133e4 | 219 | (code_length < 11)) { |
WiredHome | 152:a013ac0133e4 | 220 | code_length++; |
WiredHome | 152:a013ac0133e4 | 221 | dictionary = (dictionary_entry_t *) realloc(dictionary, |
WiredHome | 152:a013ac0133e4 | 222 | sizeof(dictionary_entry_t) * (1 << (code_length + 1))); |
WiredHome | 152:a013ac0133e4 | 223 | } |
WiredHome | 152:a013ac0133e4 | 224 | } |
WiredHome | 152:a013ac0133e4 | 225 | prev = code; |
WiredHome | 152:a013ac0133e4 | 226 | // Now copy the dictionary entry backwards into "out" |
WiredHome | 152:a013ac0133e4 | 227 | match_len = dictionary[code].len; |
WiredHome | 152:a013ac0133e4 | 228 | while (code != -1) { |
WiredHome | 152:a013ac0133e4 | 229 | int pos = dictionary[code].len - 1; |
WiredHome | 152:a013ac0133e4 | 230 | out[pos] = dictionary[code].byte; |
WiredHome | 152:a013ac0133e4 | 231 | //INFO("%p out[%d] = %02X\r\n", out, pos, out[pos]); |
WiredHome | 152:a013ac0133e4 | 232 | if (dictionary[code].prev == code) { |
WiredHome | 152:a013ac0133e4 | 233 | free(dictionary); |
WiredHome | 152:a013ac0133e4 | 234 | return not_supported_format; |
WiredHome | 152:a013ac0133e4 | 235 | } |
WiredHome | 152:a013ac0133e4 | 236 | code = dictionary[code].prev; |
WiredHome | 152:a013ac0133e4 | 237 | } |
WiredHome | 152:a013ac0133e4 | 238 | out += match_len; |
WiredHome | 152:a013ac0133e4 | 239 | } |
WiredHome | 152:a013ac0133e4 | 240 | free(dictionary); |
WiredHome | 152:a013ac0133e4 | 241 | return noerror; |
WiredHome | 152:a013ac0133e4 | 242 | } |
WiredHome | 152:a013ac0133e4 | 243 | |
WiredHome | 152:a013ac0133e4 | 244 | |
WiredHome | 152:a013ac0133e4 | 245 | /// read a block |
WiredHome | 152:a013ac0133e4 | 246 | /// |
WiredHome | 152:a013ac0133e4 | 247 | /// @param[in] fh is the handle to the gif file. |
WiredHome | 152:a013ac0133e4 | 248 | /// @param[in] data is a pointer to a pointer to the data being processed. |
WiredHome | 152:a013ac0133e4 | 249 | /// @return -1 on failure, 0 when done, or >0 as the length of a processed data block |
WiredHome | 152:a013ac0133e4 | 250 | /// |
WiredHome | 152:a013ac0133e4 | 251 | int GraphicsDisplay::read_gif_sub_blocks(FILE * fh, unsigned char **data) { |
WiredHome | 152:a013ac0133e4 | 252 | int data_length; |
WiredHome | 152:a013ac0133e4 | 253 | int index; |
WiredHome | 152:a013ac0133e4 | 254 | unsigned char block_size; |
WiredHome | 152:a013ac0133e4 | 255 | |
WiredHome | 152:a013ac0133e4 | 256 | // Everything following are data sub-blocks, until a 0-sized block is encountered. |
WiredHome | 152:a013ac0133e4 | 257 | data_length = 0; |
WiredHome | 152:a013ac0133e4 | 258 | *data = NULL; |
WiredHome | 152:a013ac0133e4 | 259 | index = 0; |
WiredHome | 152:a013ac0133e4 | 260 | |
WiredHome | 152:a013ac0133e4 | 261 | while (1) { |
WiredHome | 152:a013ac0133e4 | 262 | if (read_filesystem_bytes(&block_size, 1, fh) < 1) { |
WiredHome | 152:a013ac0133e4 | 263 | return -1; |
WiredHome | 152:a013ac0133e4 | 264 | } |
WiredHome | 152:a013ac0133e4 | 265 | if (block_size == 0) { |
WiredHome | 152:a013ac0133e4 | 266 | break; |
WiredHome | 152:a013ac0133e4 | 267 | } |
WiredHome | 152:a013ac0133e4 | 268 | data_length += block_size; |
WiredHome | 152:a013ac0133e4 | 269 | *data = (unsigned char *) realloc(*data, data_length); |
WiredHome | 152:a013ac0133e4 | 270 | if (data) { |
WiredHome | 152:a013ac0133e4 | 271 | if (read_filesystem_bytes(*data + index, block_size, fh) < block_size) { |
WiredHome | 152:a013ac0133e4 | 272 | return -1; |
WiredHome | 152:a013ac0133e4 | 273 | } |
WiredHome | 152:a013ac0133e4 | 274 | index += block_size; |
WiredHome | 152:a013ac0133e4 | 275 | } else { |
WiredHome | 152:a013ac0133e4 | 276 | return -1; |
WiredHome | 152:a013ac0133e4 | 277 | } |
WiredHome | 152:a013ac0133e4 | 278 | } |
WiredHome | 152:a013ac0133e4 | 279 | return data_length; |
WiredHome | 152:a013ac0133e4 | 280 | } |
WiredHome | 152:a013ac0133e4 | 281 | |
WiredHome | 152:a013ac0133e4 | 282 | // color table is encoded as 24-bit values, but we don't need that much space, since |
WiredHome | 152:a013ac0133e4 | 283 | // the RA8875 is configured as either 8 or 16-bit color. |
WiredHome | 152:a013ac0133e4 | 284 | // |
WiredHome | 152:a013ac0133e4 | 285 | RetCode_t GraphicsDisplay::readColorTable(color_t * colorTable, int colorTableSize, FILE * fh) { |
WiredHome | 152:a013ac0133e4 | 286 | struct { |
WiredHome | 152:a013ac0133e4 | 287 | uint8_t r; |
WiredHome | 152:a013ac0133e4 | 288 | uint8_t g; |
WiredHome | 152:a013ac0133e4 | 289 | uint8_t b; |
WiredHome | 152:a013ac0133e4 | 290 | } rgb; |
WiredHome | 152:a013ac0133e4 | 291 | while (colorTableSize--) { |
WiredHome | 152:a013ac0133e4 | 292 | if (read_filesystem_bytes(&rgb, 3, fh) < 3) |
WiredHome | 152:a013ac0133e4 | 293 | return not_supported_format; |
WiredHome | 152:a013ac0133e4 | 294 | *colorTable++ = RGB(rgb.r, rgb.g, rgb.b); |
WiredHome | 152:a013ac0133e4 | 295 | } |
WiredHome | 152:a013ac0133e4 | 296 | return noerror; |
WiredHome | 152:a013ac0133e4 | 297 | } |
WiredHome | 152:a013ac0133e4 | 298 | |
WiredHome | 152:a013ac0133e4 | 299 | RetCode_t GraphicsDisplay::readGIFImageDescriptor(FILE * fh, gif_image_descriptor_t * imageDescriptor) { |
WiredHome | 152:a013ac0133e4 | 300 | if (read_filesystem_bytes(imageDescriptor, gif_image_descriptor_size, fh) < gif_image_descriptor_size) |
WiredHome | 152:a013ac0133e4 | 301 | return not_supported_format; |
WiredHome | 152:a013ac0133e4 | 302 | INFO("gif_image_descriptor\r\n"); |
WiredHome | 152:a013ac0133e4 | 303 | INFO(" left: %d\r\n", imageDescriptor->image_left_position); |
WiredHome | 152:a013ac0133e4 | 304 | INFO(" top: %d\r\n", imageDescriptor->image_top_position); |
WiredHome | 152:a013ac0133e4 | 305 | INFO(" width: %d\r\n", imageDescriptor->image_width); |
WiredHome | 152:a013ac0133e4 | 306 | INFO(" height: %d\r\n", imageDescriptor->image_height); |
WiredHome | 152:a013ac0133e4 | 307 | INFO(" fields: %02Xx\r\n", imageDescriptor->fields); |
WiredHome | 152:a013ac0133e4 | 308 | INFO(" lct: %2d\r\n", (imageDescriptor->fields & 0x80) ? 1 : 0); |
WiredHome | 152:a013ac0133e4 | 309 | INFO(" res: %2d\r\n", (imageDescriptor->fields & 0x40) ? 1 : 0); |
WiredHome | 152:a013ac0133e4 | 310 | INFO(" sort: %2d\r\n", (imageDescriptor->fields & 0x20) ? 1 : 0); |
WiredHome | 152:a013ac0133e4 | 311 | INFO(" res: %2d\r\n", ((imageDescriptor->fields & 0x18) >> 3)); |
WiredHome | 152:a013ac0133e4 | 312 | INFO(" lct siz: %2d\r\n", 1 << ((imageDescriptor->fields & 0x07) + 1)); |
WiredHome | 152:a013ac0133e4 | 313 | if (imageDescriptor->fields & 0x80) { |
WiredHome | 152:a013ac0133e4 | 314 | local_color_table_size = 1 << ((imageDescriptor->fields & 0x07) + 1); |
WiredHome | 152:a013ac0133e4 | 315 | local_color_table = (color_t *) malloc(sizeof(color_t) * local_color_table_size); |
WiredHome | 152:a013ac0133e4 | 316 | if (local_color_table == NULL) |
WiredHome | 152:a013ac0133e4 | 317 | return not_enough_ram; |
WiredHome | 152:a013ac0133e4 | 318 | if (readColorTable(local_color_table, local_color_table_size, fh) != noerror) { |
WiredHome | 152:a013ac0133e4 | 319 | free(local_color_table); |
WiredHome | 152:a013ac0133e4 | 320 | local_color_table = NULL; |
WiredHome | 152:a013ac0133e4 | 321 | return not_supported_format; |
WiredHome | 152:a013ac0133e4 | 322 | } |
WiredHome | 152:a013ac0133e4 | 323 | } |
WiredHome | 152:a013ac0133e4 | 324 | return noerror; |
WiredHome | 152:a013ac0133e4 | 325 | } |
WiredHome | 152:a013ac0133e4 | 326 | |
WiredHome | 152:a013ac0133e4 | 327 | /// Process the image section of the GIF file |
WiredHome | 152:a013ac0133e4 | 328 | /// |
WiredHome | 152:a013ac0133e4 | 329 | /// @param[in] fh is the handle to the file. |
WiredHome | 152:a013ac0133e4 | 330 | /// @param[in] uncompress_gifed_data is a pointer to a pointer to where the data will be placed. |
WiredHome | 152:a013ac0133e4 | 331 | /// @returns true if all went well. |
WiredHome | 152:a013ac0133e4 | 332 | /// |
WiredHome | 152:a013ac0133e4 | 333 | RetCode_t GraphicsDisplay::process_gif_image_descriptor(FILE * fh, uint8_t ** uncompress_gifed_data, int width, int height) { |
WiredHome | 152:a013ac0133e4 | 334 | int compressed_data_length; |
WiredHome | 152:a013ac0133e4 | 335 | unsigned char *compressed_data = NULL; |
WiredHome | 152:a013ac0133e4 | 336 | unsigned char lzw_code_size; |
WiredHome | 152:a013ac0133e4 | 337 | int uncompress_gifed_data_length = 0; |
WiredHome | 152:a013ac0133e4 | 338 | RetCode_t res = not_supported_format; |
WiredHome | 152:a013ac0133e4 | 339 | local_color_table_size = 0; |
WiredHome | 152:a013ac0133e4 | 340 | |
WiredHome | 152:a013ac0133e4 | 341 | if (read_filesystem_bytes(&lzw_code_size, 1, fh) < 1) |
WiredHome | 152:a013ac0133e4 | 342 | goto done; |
WiredHome | 152:a013ac0133e4 | 343 | INFO("lzw_code_size\r\n"); |
WiredHome | 152:a013ac0133e4 | 344 | INFO(" lzw code: %d\r\n", lzw_code_size); |
WiredHome | 152:a013ac0133e4 | 345 | compressed_data_length = read_gif_sub_blocks(fh, &compressed_data); |
WiredHome | 152:a013ac0133e4 | 346 | if (compressed_data_length > 0) { |
WiredHome | 152:a013ac0133e4 | 347 | uncompress_gifed_data_length = width * height; |
WiredHome | 152:a013ac0133e4 | 348 | *uncompress_gifed_data = (unsigned char *) malloc(uncompress_gifed_data_length); |
WiredHome | 152:a013ac0133e4 | 349 | if (*uncompress_gifed_data == NULL) |
WiredHome | 152:a013ac0133e4 | 350 | return not_enough_ram; |
WiredHome | 152:a013ac0133e4 | 351 | res = uncompress_gif(lzw_code_size, compressed_data, compressed_data_length, *uncompress_gifed_data); |
WiredHome | 152:a013ac0133e4 | 352 | } |
WiredHome | 152:a013ac0133e4 | 353 | done: |
WiredHome | 152:a013ac0133e4 | 354 | if (compressed_data) |
WiredHome | 152:a013ac0133e4 | 355 | free(compressed_data); |
WiredHome | 152:a013ac0133e4 | 356 | return res; |
WiredHome | 152:a013ac0133e4 | 357 | } |
WiredHome | 152:a013ac0133e4 | 358 | |
WiredHome | 152:a013ac0133e4 | 359 | |
WiredHome | 152:a013ac0133e4 | 360 | int GraphicsDisplay::process_gif_extension(FILE * fh) { |
WiredHome | 152:a013ac0133e4 | 361 | extension_t extension; |
WiredHome | 152:a013ac0133e4 | 362 | graphic_control_extension_t gce; |
WiredHome | 152:a013ac0133e4 | 363 | application_extension_t application; |
WiredHome | 152:a013ac0133e4 | 364 | plaintext_extension_t plaintext; |
WiredHome | 152:a013ac0133e4 | 365 | unsigned char *extension_data = NULL; |
WiredHome | 152:a013ac0133e4 | 366 | /* int extension_data_length; */ |
WiredHome | 152:a013ac0133e4 | 367 | |
WiredHome | 152:a013ac0133e4 | 368 | if (read_filesystem_bytes(&extension, extension_size, fh) < extension_size) { |
WiredHome | 152:a013ac0133e4 | 369 | return 0; |
WiredHome | 152:a013ac0133e4 | 370 | } |
WiredHome | 152:a013ac0133e4 | 371 | INFO("extension\r\n"); |
WiredHome | 152:a013ac0133e4 | 372 | INFO(" code: %d\r\n", extension.extension_code); |
WiredHome | 152:a013ac0133e4 | 373 | INFO(" block size: %d\r\n", extension.block_size); |
WiredHome | 152:a013ac0133e4 | 374 | switch (extension.extension_code) { |
WiredHome | 152:a013ac0133e4 | 375 | case GRAPHIC_CONTROL: |
WiredHome | 152:a013ac0133e4 | 376 | if (read_filesystem_bytes(&gce, graphic_control_extension_size, fh) < graphic_control_extension_size) { |
WiredHome | 152:a013ac0133e4 | 377 | return 0; |
WiredHome | 152:a013ac0133e4 | 378 | } |
WiredHome | 152:a013ac0133e4 | 379 | INFO("graphic_control_extension\r\n"); |
WiredHome | 152:a013ac0133e4 | 380 | INFO(" fields: %d\r\n", gce.fields); |
WiredHome | 152:a013ac0133e4 | 381 | INFO(" delay time: %d\r\n", gce.delay_time); |
WiredHome | 152:a013ac0133e4 | 382 | INFO(" transparent: %d\r\n", gce.transparent_color_index); |
WiredHome | 152:a013ac0133e4 | 383 | break; |
WiredHome | 152:a013ac0133e4 | 384 | case APPLICATION_EXTENSION: |
WiredHome | 152:a013ac0133e4 | 385 | if (read_filesystem_bytes(&application, application_extension_size, fh) < application_extension_size) { |
WiredHome | 152:a013ac0133e4 | 386 | return 0; |
WiredHome | 152:a013ac0133e4 | 387 | } |
WiredHome | 152:a013ac0133e4 | 388 | HexDump("application", (const uint8_t *) &application, sizeof(application)); |
WiredHome | 152:a013ac0133e4 | 389 | break; |
WiredHome | 152:a013ac0133e4 | 390 | case COMMENT_EXTENSION: |
WiredHome | 152:a013ac0133e4 | 391 | // comment extension; do nothing - all the data is in the |
WiredHome | 152:a013ac0133e4 | 392 | // sub-blocks that follow. |
WiredHome | 152:a013ac0133e4 | 393 | break; |
WiredHome | 152:a013ac0133e4 | 394 | case PLAINTEXT_EXTENSION: |
WiredHome | 152:a013ac0133e4 | 395 | if (read_filesystem_bytes(&plaintext, plaintext_extension_size, fh) < plaintext_extension_size) { |
WiredHome | 152:a013ac0133e4 | 396 | return 0; |
WiredHome | 152:a013ac0133e4 | 397 | } |
WiredHome | 152:a013ac0133e4 | 398 | HexDump("plaintext", (const uint8_t *) &plaintext, sizeof(plaintext)); |
WiredHome | 152:a013ac0133e4 | 399 | break; |
WiredHome | 152:a013ac0133e4 | 400 | default: |
WiredHome | 152:a013ac0133e4 | 401 | return (0); |
WiredHome | 152:a013ac0133e4 | 402 | } |
WiredHome | 152:a013ac0133e4 | 403 | // All extensions are followed by data sub-blocks; even if it's |
WiredHome | 152:a013ac0133e4 | 404 | // just a single data sub-block of length 0 |
WiredHome | 152:a013ac0133e4 | 405 | /* extension_data_length = */ read_gif_sub_blocks(fh, &extension_data); |
WiredHome | 152:a013ac0133e4 | 406 | if (extension_data != NULL) |
WiredHome | 152:a013ac0133e4 | 407 | free(extension_data); |
WiredHome | 152:a013ac0133e4 | 408 | return 1; |
WiredHome | 152:a013ac0133e4 | 409 | } |
WiredHome | 152:a013ac0133e4 | 410 | |
WiredHome | 152:a013ac0133e4 | 411 | |
WiredHome | 152:a013ac0133e4 | 412 | RetCode_t GraphicsDisplay::_RenderGIF(loc_t ScreenX, loc_t ScreenY, FILE * fh) { |
WiredHome | 152:a013ac0133e4 | 413 | //int color_resolution_bits; |
WiredHome | 152:a013ac0133e4 | 414 | global_color_table_size = 0; |
WiredHome | 152:a013ac0133e4 | 415 | local_color_table_size = 0; |
WiredHome | 152:a013ac0133e4 | 416 | |
WiredHome | 152:a013ac0133e4 | 417 | if (GetGIFHeader(fh) != noerror) |
WiredHome | 152:a013ac0133e4 | 418 | return not_supported_format; |
WiredHome | 152:a013ac0133e4 | 419 | //color_resolution_bits = ((screen_descriptor.fields & 0x70) >> 4) + 1; |
WiredHome | 152:a013ac0133e4 | 420 | if (screen_descriptor.fields & 0x80) { |
WiredHome | 152:a013ac0133e4 | 421 | // If bit 7 is set, the next block is a global color table; read it |
WiredHome | 152:a013ac0133e4 | 422 | global_color_table_size = 1 << ((screen_descriptor.fields & 0x07) + 1); |
WiredHome | 152:a013ac0133e4 | 423 | global_color_table = (color_t *) malloc(sizeof(color_t) * global_color_table_size); |
WiredHome | 152:a013ac0133e4 | 424 | if (global_color_table == NULL) |
WiredHome | 152:a013ac0133e4 | 425 | return not_enough_ram; |
WiredHome | 152:a013ac0133e4 | 426 | // XXX this could conceivably return a short count... |
WiredHome | 152:a013ac0133e4 | 427 | if (readColorTable(global_color_table, global_color_table_size, fh) != noerror) { |
WiredHome | 152:a013ac0133e4 | 428 | return not_supported_format; |
WiredHome | 152:a013ac0133e4 | 429 | } |
WiredHome | 152:a013ac0133e4 | 430 | HexDump("Global Color Table", (const uint8_t *) global_color_table, 3 * global_color_table_size); |
WiredHome | 152:a013ac0133e4 | 431 | } |
WiredHome | 152:a013ac0133e4 | 432 | unsigned char block_type = 0x0; |
WiredHome | 152:a013ac0133e4 | 433 | uint8_t * uncompress_gifed_data = NULL; |
WiredHome | 152:a013ac0133e4 | 434 | gif_image_descriptor_t gif_image_descriptor; // the image fragment |
WiredHome | 152:a013ac0133e4 | 435 | while (block_type != TRAILER) { |
WiredHome | 152:a013ac0133e4 | 436 | if (read_filesystem_bytes(&block_type, sizeof(block_type), fh) < sizeof(block_type)) |
WiredHome | 152:a013ac0133e4 | 437 | return not_supported_format; |
WiredHome | 152:a013ac0133e4 | 438 | INFO("block type: %02X", block_type); |
WiredHome | 152:a013ac0133e4 | 439 | |
WiredHome | 152:a013ac0133e4 | 440 | switch (block_type) { |
WiredHome | 152:a013ac0133e4 | 441 | case IMAGE_DESCRIPTOR: |
WiredHome | 152:a013ac0133e4 | 442 | if (readGIFImageDescriptor(fh, &gif_image_descriptor) != noerror) |
WiredHome | 152:a013ac0133e4 | 443 | return not_supported_format; |
WiredHome | 152:a013ac0133e4 | 444 | if (process_gif_image_descriptor(fh, &uncompress_gifed_data, gif_image_descriptor.image_width, gif_image_descriptor.image_height) == noerror) { |
WiredHome | 152:a013ac0133e4 | 445 | if (uncompress_gifed_data) { |
WiredHome | 152:a013ac0133e4 | 446 | // Ready to render to the screen |
WiredHome | 152:a013ac0133e4 | 447 | INFO("Render to (%d,%d)\r\n", ScreenX, ScreenY); |
WiredHome | 152:a013ac0133e4 | 448 | color_t * active_color_table = (local_color_table) ? local_color_table : global_color_table; |
WiredHome | 152:a013ac0133e4 | 449 | |
WiredHome | 152:a013ac0133e4 | 450 | // create a local image buffer for this fragment |
WiredHome | 152:a013ac0133e4 | 451 | color_t * cbmp = (color_t *) malloc(sizeof(color_t) * gif_image_descriptor.image_width * gif_image_descriptor.image_height); |
WiredHome | 152:a013ac0133e4 | 452 | if (cbmp == NULL) |
WiredHome | 152:a013ac0133e4 | 453 | return not_enough_ram; |
WiredHome | 152:a013ac0133e4 | 454 | for (int i = 0; i < gif_image_descriptor.image_width * gif_image_descriptor.image_height; i++) { |
WiredHome | 152:a013ac0133e4 | 455 | int cIndex = uncompress_gifed_data[i]; |
WiredHome | 152:a013ac0133e4 | 456 | cbmp[i] = active_color_table[cIndex]; |
WiredHome | 152:a013ac0133e4 | 457 | } |
WiredHome | 152:a013ac0133e4 | 458 | // Write Fragment to Screen |
WiredHome | 152:a013ac0133e4 | 459 | #if 0 |
WiredHome | 152:a013ac0133e4 | 460 | INFO("Render fragment: (%d,%d), offset: (%d,%d), w x h (%d,%d)\r\n", |
WiredHome | 152:a013ac0133e4 | 461 | ScreenX, ScreenY, |
WiredHome | 152:a013ac0133e4 | 462 | gif_image_descriptor.image_left_position, |
WiredHome | 152:a013ac0133e4 | 463 | gif_image_descriptor.image_top_position, |
WiredHome | 152:a013ac0133e4 | 464 | gif_image_descriptor.image_width, |
WiredHome | 152:a013ac0133e4 | 465 | gif_image_descriptor.image_height); |
WiredHome | 152:a013ac0133e4 | 466 | for (uint16_t y = 0; y < gif_image_descriptor.image_height; y++) { |
WiredHome | 152:a013ac0133e4 | 467 | for (uint16_t x = 0; x < gif_image_descriptor.image_width; x++) { |
WiredHome | 152:a013ac0133e4 | 468 | INFO("%04X ", cbmp[y * gif_image_descriptor.image_height + x]); |
WiredHome | 152:a013ac0133e4 | 469 | } |
WiredHome | 152:a013ac0133e4 | 470 | INFO("\r\n"); |
WiredHome | 152:a013ac0133e4 | 471 | } |
WiredHome | 152:a013ac0133e4 | 472 | #else |
WiredHome | 152:a013ac0133e4 | 473 | rect_t restore = windowrect; |
WiredHome | 152:a013ac0133e4 | 474 | window(ScreenX + gif_image_descriptor.image_left_position, |
WiredHome | 152:a013ac0133e4 | 475 | ScreenY + gif_image_descriptor.image_top_position, |
WiredHome | 152:a013ac0133e4 | 476 | gif_image_descriptor.image_width, |
WiredHome | 152:a013ac0133e4 | 477 | gif_image_descriptor.image_height); |
WiredHome | 152:a013ac0133e4 | 478 | pixelStream(cbmp, screen_descriptor.width * screen_descriptor.height, |
WiredHome | 152:a013ac0133e4 | 479 | ScreenX + gif_image_descriptor.image_left_position, |
WiredHome | 152:a013ac0133e4 | 480 | ScreenY + gif_image_descriptor.image_top_position); |
WiredHome | 152:a013ac0133e4 | 481 | window(restore); |
WiredHome | 152:a013ac0133e4 | 482 | #endif |
WiredHome | 152:a013ac0133e4 | 483 | // end write |
WiredHome | 152:a013ac0133e4 | 484 | free(cbmp); |
WiredHome | 152:a013ac0133e4 | 485 | } |
WiredHome | 152:a013ac0133e4 | 486 | if (local_color_table) { |
WiredHome | 152:a013ac0133e4 | 487 | free(local_color_table); |
WiredHome | 152:a013ac0133e4 | 488 | local_color_table = NULL; |
WiredHome | 152:a013ac0133e4 | 489 | } |
WiredHome | 152:a013ac0133e4 | 490 | } else { |
WiredHome | 152:a013ac0133e4 | 491 | return not_supported_format; |
WiredHome | 152:a013ac0133e4 | 492 | } |
WiredHome | 152:a013ac0133e4 | 493 | break; |
WiredHome | 152:a013ac0133e4 | 494 | case EXTENSION_INTRODUCER: |
WiredHome | 152:a013ac0133e4 | 495 | if (!process_gif_extension(fh)) |
WiredHome | 152:a013ac0133e4 | 496 | return not_supported_format; |
WiredHome | 152:a013ac0133e4 | 497 | break; |
WiredHome | 152:a013ac0133e4 | 498 | case TRAILER: |
WiredHome | 152:a013ac0133e4 | 499 | break; |
WiredHome | 152:a013ac0133e4 | 500 | default: |
WiredHome | 152:a013ac0133e4 | 501 | return not_supported_format; |
WiredHome | 152:a013ac0133e4 | 502 | } |
WiredHome | 152:a013ac0133e4 | 503 | } |
WiredHome | 152:a013ac0133e4 | 504 | return noerror; |
WiredHome | 152:a013ac0133e4 | 505 | } |
WiredHome | 152:a013ac0133e4 | 506 | |
WiredHome | 152:a013ac0133e4 | 507 | |
WiredHome | 152:a013ac0133e4 | 508 | // hasGIFHeader determines if it is a GIF file |
WiredHome | 152:a013ac0133e4 | 509 | // |
WiredHome | 152:a013ac0133e4 | 510 | // This reads a few bytes of the file and determines if they have the |
WiredHome | 152:a013ac0133e4 | 511 | // GIF89a signature. GIF87a is not supported. |
WiredHome | 152:a013ac0133e4 | 512 | // |
WiredHome | 152:a013ac0133e4 | 513 | // @param fh is a file handle. |
WiredHome | 152:a013ac0133e4 | 514 | // @returns true if it is GIF89a. |
WiredHome | 152:a013ac0133e4 | 515 | // |
WiredHome | 152:a013ac0133e4 | 516 | bool GraphicsDisplay::hasGIFHeader(FILE * fh) { |
WiredHome | 152:a013ac0133e4 | 517 | char GIF_Header[6]; |
WiredHome | 152:a013ac0133e4 | 518 | if (read_filesystem_bytes(GIF_Header, sizeof(GIF_Header), fh) != sizeof(GIF_Header)) |
WiredHome | 152:a013ac0133e4 | 519 | return false; |
WiredHome | 152:a013ac0133e4 | 520 | if (strncmp("GIF89a", GIF_Header, sizeof(GIF_Header))) |
WiredHome | 152:a013ac0133e4 | 521 | return false; |
WiredHome | 152:a013ac0133e4 | 522 | return true; |
WiredHome | 152:a013ac0133e4 | 523 | } |
WiredHome | 152:a013ac0133e4 | 524 | |
WiredHome | 152:a013ac0133e4 | 525 | |
WiredHome | 152:a013ac0133e4 | 526 | RetCode_t GraphicsDisplay::GetGIFHeader(FILE * fh) { |
WiredHome | 152:a013ac0133e4 | 527 | if (read_filesystem_bytes(&screen_descriptor, gif_screen_descriptor_size, fh) < gif_screen_descriptor_size) { |
WiredHome | 152:a013ac0133e4 | 528 | return not_supported_format; |
WiredHome | 152:a013ac0133e4 | 529 | } |
WiredHome | 152:a013ac0133e4 | 530 | screen_descriptor_isvalid = true; |
WiredHome | 152:a013ac0133e4 | 531 | INFO("screen_descriptor\r\n"); |
WiredHome | 152:a013ac0133e4 | 532 | INFO(" width: %d\r\n", screen_descriptor.width); |
WiredHome | 152:a013ac0133e4 | 533 | INFO(" height: %d\r\n", screen_descriptor.height); |
WiredHome | 152:a013ac0133e4 | 534 | INFO(" fields: %02Xx\r\n", screen_descriptor.fields); |
WiredHome | 152:a013ac0133e4 | 535 | INFO(" gct: %2d\r\n", (screen_descriptor.fields & 0x80) ? 1 : 0); |
WiredHome | 152:a013ac0133e4 | 536 | INFO(" res: %2d\r\n", ((screen_descriptor.fields & 0x70) >> 4) + 1); |
WiredHome | 152:a013ac0133e4 | 537 | INFO(" sort: %2d\r\n", (screen_descriptor.fields & 0x08) ? 1 : 0); |
WiredHome | 152:a013ac0133e4 | 538 | INFO(" gct siz: %2d\r\n", 1 << ((screen_descriptor.fields & 0x07) + 1)); |
WiredHome | 152:a013ac0133e4 | 539 | INFO(" back clr: %d\r\n", screen_descriptor.background_color_index); |
WiredHome | 152:a013ac0133e4 | 540 | INFO(" pix rat: %d\r\n", screen_descriptor.pixel_aspect_ratio); |
WiredHome | 152:a013ac0133e4 | 541 | return noerror; |
WiredHome | 152:a013ac0133e4 | 542 | } |
WiredHome | 152:a013ac0133e4 | 543 | |
WiredHome | 152:a013ac0133e4 | 544 | |
WiredHome | 152:a013ac0133e4 | 545 | RetCode_t GraphicsDisplay::GetGIFMetrics(gif_screen_descriptor_t * imageDescriptor, const char * Name_GIF) { |
WiredHome | 152:a013ac0133e4 | 546 | RetCode_t ret = not_supported_format; |
WiredHome | 152:a013ac0133e4 | 547 | |
WiredHome | 152:a013ac0133e4 | 548 | if (screen_descriptor_isvalid) { |
WiredHome | 152:a013ac0133e4 | 549 | ret = noerror; |
WiredHome | 152:a013ac0133e4 | 550 | } else { |
WiredHome | 152:a013ac0133e4 | 551 | FILE *fh = fopen(Name_GIF, "rb"); |
WiredHome | 152:a013ac0133e4 | 552 | if (fh) { |
WiredHome | 152:a013ac0133e4 | 553 | ret = GetGIFHeader(fh); |
WiredHome | 152:a013ac0133e4 | 554 | fclose(fh); |
WiredHome | 152:a013ac0133e4 | 555 | } |
WiredHome | 152:a013ac0133e4 | 556 | } |
WiredHome | 152:a013ac0133e4 | 557 | if (ret == noerror) |
WiredHome | 152:a013ac0133e4 | 558 | *imageDescriptor = screen_descriptor; |
WiredHome | 152:a013ac0133e4 | 559 | return ret; |
WiredHome | 152:a013ac0133e4 | 560 | } |
WiredHome | 152:a013ac0133e4 | 561 | |
WiredHome | 152:a013ac0133e4 | 562 | |
WiredHome | 152:a013ac0133e4 | 563 | RetCode_t GraphicsDisplay::RenderGIFFile(loc_t x, loc_t y, const char *Name_GIF) { |
WiredHome | 152:a013ac0133e4 | 564 | RetCode_t rt = file_not_found; |
WiredHome | 152:a013ac0133e4 | 565 | |
WiredHome | 152:a013ac0133e4 | 566 | INFO("Opening {%s}", Name_GIF); |
WiredHome | 152:a013ac0133e4 | 567 | screen_descriptor_isvalid = false; |
WiredHome | 152:a013ac0133e4 | 568 | FILE *fh = fopen(Name_GIF, "rb"); |
WiredHome | 152:a013ac0133e4 | 569 | if (fh) { |
WiredHome | 152:a013ac0133e4 | 570 | if (hasGIFHeader(fh)) { |
WiredHome | 152:a013ac0133e4 | 571 | rt = _RenderGIF(x, y, fh); |
WiredHome | 152:a013ac0133e4 | 572 | } |
WiredHome | 152:a013ac0133e4 | 573 | fclose(fh); |
WiredHome | 152:a013ac0133e4 | 574 | if (global_color_table) |
WiredHome | 152:a013ac0133e4 | 575 | free(global_color_table); |
WiredHome | 152:a013ac0133e4 | 576 | if (local_color_table) |
WiredHome | 152:a013ac0133e4 | 577 | free(local_color_table); |
WiredHome | 152:a013ac0133e4 | 578 | } |
WiredHome | 152:a013ac0133e4 | 579 | return rt; |
WiredHome | 152:a013ac0133e4 | 580 | } |
WiredHome | 152:a013ac0133e4 | 581 | |
WiredHome | 152:a013ac0133e4 | 582 |